1 Department of Psychology, University of Toronto, Toronto, Ontario, Canada.
2 KITE-Toronto Rehabilitation Institute, University Health Network, Toronto, Ontario, Canada.
3 Rehabilitation Sciences Institute, University of Toronto, Toronto, Ontario, Canada.
4 Department of Psychology, Concordia University, Montreal, Quebec, Canada.
5 PERFORM Centre, Concordia University School of Health, Montreal, Quebec, Canada.
6 Department of Medicine, Université de Montréal, Montreal, Quebec, Canada.
7 Montreal Heart Institute Research Center, Montreal, Quebec, Canada.
8 Research Center of the University Institute of Geriatrics of Montreal, Montreal, Quebec, Canada.
9 School of Optometry, Université de Montréal, Montréal, Québec, Canada.
10 Department of Health, Kinesiology and Applied Physiology, Concordia University, Montreal, Quebec, Canada.
11 School of Speech Therapy and Audiology, Université de Montréal, Montreal, Quebec, Canada.

Background: Multitasking, such as listening while balancing, relies on integrated processing in the sensory, cognitive, and motor systems; systems that often decline with age. Hearing loss is linked to increased risks of both falls and cognitive decline. Improving cognitive processing through executive function (EF) training may support balance, especially in older adults with hearing loss. This randomized controlled study conducted across age groups and hearing abilities, examined the effects of a 12-week EF training program on postural outcomes (center of pressure (COP)) using an auditory-cognitive-postural dual-task paradigm.

Methods: Sixty-five participants including middle-aged adults with normal hearing (MA; n = 19), older adults with normal hearing (OA; n = 23), and older adults with hearing loss who used hearing aids (OAHL; n = 23) were randomly assigned within each age group to an EF training condition or a control condition. Primary outcome measures were auditory-cognitive reaction time on an auditory 2-back working memory task and postural measures (COP path length variability), which were collected in single- and dual-task conditions. Secondary analyses examined whether sensory, cognitive, and mobility performance, as evaluated by baseline standardized assessments, predicted training-related outcomes.

Results: Across MA, OA, and OAHL groups, cognitive performance generally improved following EF training and transfer of these training effects were observed during experimental postural tasks and auditory-cognitive tasks, but differed depending on age, pure-tone hearing thresholds, and cognitive abilities. Specifically, for postural outcomes, performance improved after training, but only for older adults with better hearing, while those with poorer hearing at any age did not improve. For auditory-cognitive task performance, older adults with the poorest hearing and cognition benefited the most from training.

Conclusions: EF training may support balance and cognition in older adults, although its benefits for balance may be limited by severe hearing loss, underscoring the value of early intervention.

Trial registration: Registry Name: ClinicalTrials.gov. Registration/Trial number: NCT05418998. Trial URL: https://clinicaltrials.gov/ct2/show/NCT05418998.